16.5.1. Signal Behavior in Common Source Configuration

Try these first

1. 1.

   Explain the basic configuration of a common source amplifier.

   Hint

   Think about how the source, gate, and drain are oriented.

2. 2.

   What does V_GS stand for?

   Hint

   Look for the voltage difference between gate and source.

3. 3.

   What is the function of a common source configuration?

   • To decrease voltage
   • To amplify signals
   • To regulate power

   Hint

   Consider the main purpose of an amplifier.

4. 4.

   True or False: The threshold voltage is crucial for determining if a MOSFET is on or off.

   • True
   • False

   Hint

   Think about how you activate the device.

5. 5.

   Given a common source amplifier with a threshold voltage of 1V, calculate I_DS when V_GS is 3V and the transconductance parameter K is 0.5 mA/V².

   Hint

   Apply the transconductance formula correctly.

6. 6.

   Describe how the operating point shifts when increasing V_GS from 2V to 3V while keeping V_DS constant.

   Hint

   Think about how increasing gate voltage affects current.